explorer's defective throttle (1.6 mb)
TRANSCRIPT
Explorer’s Defective Throttle System
AIR TO ENGINE
EGR
COLD AIR
Explorer’s Defective Throttle System
The Ford Explorer throttle utilizes a cold air intake and an EGR return system for fuel economy.
1
THROTTLE BODY
AIR TO ENGINE
ACCELERATION CABLE
EGR
AIR TO ENGINE
EGR
AIR TO ENGINE
EGR
The Throttle Interior
CUTAWAY VIEW OFTHROTTLE INTERIOR
THROTTLE BODY
AIR TO ENGINE
ACCELERATION CABLE
EGR
A cable from the accelerator opens a butterfly valve, allowing cold air to enter the throttle body.
2
COLD AIR
AIR TO ENGINE
EGR
EGR System
CUTAWAY VIEW OFTHROTTLE INTERIOR
As cool air fills the throttle body, a small amount of exhaust returns to the throttle through the EGR valve.
3
COLD AIR
AIR TO ENGINE
EGR
Cool Air Mixed with Exhaust
CUTAWAY VIEW OFTHROTTLE INTERIOR
When the butterfly valve closes, the exhaust from the EGR is drawn back towards the throttle body, and mixes with air.
4
COLD AIREXHAUST
AIR TO ENGINE
EGR
Carbon Deposits on Chamber Walls
CUTAWAY VIEW OFTHROTTLE INTERIOR
The vapor mixture deposits carbon along the interior walls of the throttle body and tubes.
5
AIR TO ENGINE
EGR
Carbon Deposit Sticks Throttle
CUTAWAY VIEW OFTHROTTLE INTERIOR
Greater amounts of carbon build up over time, until the butterfly valve becomes stuck in position, held by the carbon deposits.
6
AIR TO ENGINE
EGR
Vehicle Hesitates or Slows
CUTAWAY VIEW OFTHROTTLE INTERIOR
The vehicle loses power, unable to get outside air into the throttle body.
7
AIR TO ENGINE
EGR
Increased Pressure to Accelerator
CUTAWAY VIEW OFTHROTTLE INTERIOR
The accelerator pedal has little or no effect. The driver increases pressure on the pedal andfinally, the valve breaks free.
8
AIR TO ENGINE
EGR
Vehicle Lurches Forward Suddenly
CUTAWAY VIEW OFTHROTTLE INTERIOR
Instantly, a surplus of air and fuel shoots into the throttle, causing the Explorer to lurch forward suddenly.
9
COLD AIR
FUEL
NEED SAM TO SHOW ME WHERE FUEL INLET IS LOCATED
Ford’s Fix for the Throttle Stick Problem
AIR TO ENGINE
EGR
Ford’s Fix for the Throttle Stick Problem
CUTAWAY VIEW OFTHROTTLE INTERIOR
Cold air mixes with exhaust, depositing carbon on throttle walls. Residue gums butterfly valve closed.
1
COLD AIR
AIR TO ENGINE
EGR
Ford’s Fix for the Throttle Stick Problem
CUTAWAY VIEW OFTHROTTLE INTERIOR
Angle of EGR valve encourages exhaust to reverse direction, instead of it’s intended route to the engine.
2
AIR TO ENGINE
EGR
Ford’s Fix for the Throttle Stick Problem
EGR valve is bored out and replaced with valve that angles away from throttle body.
3
CUTAWAY VIEW OFTHROTTLE INTERIOR
EGR
AIR TO ENGINE
EGR
Ford’s Fix for the Throttle Stick Problem
Exhaust now travels away from throttle body towards engine. Throttle body remains carbon-free.
4
CUTAWAY VIEW OFTHROTTLE INTERIOR
EGR
COLD AIR